v1/__algorithm/find_first_of.h

0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef _LIBCPP___ALGORITHM_FIND_FIRST_OF_H
0011 #define _LIBCPP___ALGORITHM_FIND_FIRST_OF_H
0012
0013 #include <__algorithm/comp.h>
0014 #include <__config>
0015
0016 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0017 #  pragma GCC system_header
0018 #endif
0019
0020 _LIBCPP_BEGIN_NAMESPACE_STD
0021
0022 template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate>
0023 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator1 __find_first_of_ce(
0024     _ForwardIterator1 __first1,
0025     _ForwardIterator1 __last1,
0026     _ForwardIterator2 __first2,
0027     _ForwardIterator2 __last2,
0028     _BinaryPredicate&& __pred) {
0029   for (; __first1 != __last1; ++__first1)
0030     for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j)
0031       if (__pred(*__first1, *__j))
0032         return __first1;
0033   return __last1;
0034 }
0035
0036 template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate>
0037 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator1 find_first_of(
0038     _ForwardIterator1 __first1,
0039     _ForwardIterator1 __last1,
0040     _ForwardIterator2 __first2,
0041     _ForwardIterator2 __last2,
0042     _BinaryPredicate __pred) {
0043   return std::__find_first_of_ce(__first1, __last1, __first2, __last2, __pred);
0044 }
0045
0046 template <class _ForwardIterator1, class _ForwardIterator2>
0047 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator1 find_first_of(
0048     _ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2, _ForwardIterator2 __last2) {
0049   return std::__find_first_of_ce(__first1, __last1, __first2, __last2, __equal_to());
0050 }
0051
0052 _LIBCPP_END_NAMESPACE_STD
0053
0054 #endif // _LIBCPP___ALGORITHM_FIND_FIRST_OF_H